| abstract |
Concentration of carbon dioxide, generally increasing the concentration of carbon dioxide in the air, is beneficial in agriculture, horticulture, etc. for growing plants that use carbon dioxide for photosynthesis. Various carbon dioxide concentrators have been developed, but there are many problems. Therefore, an adsorbent excellent in carbon dioxide adsorption is developed, and an apparatus for concentrating carbon dioxide in the air by using this is provided. A pressure swing type concentrator using ferrierite as an adsorbent, wherein the ferrierite has a pore volume of 0.01 to 1 μm and a pore volume of 0.1 mL / g or more by alkali treatment. |